TSG2608 lighting remote control encoding and decoding circuit diagram

The picture shows the TSG2608 coded lighting wireless remote control circuit, which can control the switches of 7 lights and 1 TV without crosstalk with other remote control lights (each remote control has up to 65,000 codes). The chart below is the codec of the remote control .

The circuit principle is as follows: (1) Remote control codec principle The key technology of TSG2608 remote control is the use of QCH417/418/419 remote control codec , as shown in the figure is its basic application diagram.

In the figure, QCH417 is an encoder that can perform 4-state encoding. The so-called 4-state encoding means that the encoding bits A1 to A11 can be connected in 4 ways: grounded Vss, connected to high level Vdd, left floating, and connected to A0. Therefore, the number of codes should be "4" (i.e. 4.19 million groups).

QCH419 is a decoder and also has 4.19 million sets of decoding addresses. When the encoding signal received from DIN is consistent with the local decoding address, the VT of QCH419 will generate a positive pulse to indicate that the decoding is correct, otherwise it indicates that the decoding is unsuccessful. QCH418 is also a decoder, but only A0 to A7 are used as decoding addresses, and A8 to A11 are used as data.